| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.91 |
| Score | 0% | 58% |
Elements that belong to the same period in the Periodic Table of the Elements have the same number of:
protons |
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atomic mass units |
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electrons |
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electron shells |
The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.
What kind of weather front is likely to create clouds and storms?
warm front |
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stationary front |
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temperate front |
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cold front |
A warm front is the boundary between warm and cool (or cold) air when the warm air is replacing the cold air. Warm air at the surface pushes above the cool air mass creating clouds and storms.
Which of the following is not a method of heat transfer?
convection |
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reflection |
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radiation |
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conduction |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.
-40°F is how many °C?
\({40 \over 9}\) |
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-8 |
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-40 |
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\(-{40 \over 9}\) |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (-40 - 32)\)
\(C° = {5 \over 9} (-72) = {{-72 \times 5} \over 9}\)
\(C° = {-360 \over 9}\)
\(C° = -40\)
Vector quantities are fully described by which of the following?
a direction only |
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a magnitude only |
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a direction and a polarity |
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a magnitude and a direction |
Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: \(\vec{v}\)